
#!/bin/bash

awk -v term_cols="${width:-$(tput cols || echo 80)}" 'BEGIN{


    s="  ";
        for (colnum = 0; colnum<term_cols; colnum++) {
		        r = 255-(colnum*255/term_cols);
			        g = (colnum*510/term_cols);
				        b = (colnum*255/term_cols);
					        if (g>255) g = 510-g;
							        printf "\033[48;2;%d;%d;%dm", r,g,b;
								        printf "\033[38;2;%d;%d;%dm", 255-r,255-g,255-b;
									        printf "%s\033[0m", substr(s,colnum%2+1,1);
										    }
										        printf "\n";

										}'
